Process and arrangement for production and placing of filling material in hollow building elements



Oct. 17, 1967 G. KURE 3,347,136

PROCESS AND ARRANGEMENT FOR PRODUCTION AND PLACING OF FILLING MATERIALIN HOLLOW BUILDING ELEMENTS Filed. Feb. 13, 1964 2 Sheets-Sheet lINVENTORF 9 12002 lfww, $74 fioum'rrv Oct. 17, 1967 G. KURE 3,347,136

PROCESS AND ARRANGEMENT FOR PRODUCTION AND PLACING OF FILLING MATERIALIN HOLLOW BUILDING ELEMENTS Filed Feb-13, 1964 2 Sheets-Sheet 2 INVENTOR United States Patent Ofifice Patented Oct. 17, 1967 4 Claims. ic1.931

ABSTRACT OF THE DISCLOSURE A method and machine for slitting a web paperor similar material, turning the strips 90, shaping them and feedingthem over the open face of a door or other building element, cutting offpredetermined lengths and allowing them to drop freely into said openface, prior to completing the door or element.

The invention relates to a process and arrangements by aid of which onecan simultaneously produce and place filling material in hollow buildingelements, the material consisting of strips of paper, cardboard or thelike which are given a suitable shape, for example waved or zigzag andpositioned edgewise between the flat side panels of the buildingelements.

For a series of elements in house-building, like doors, kitchensections, wardrobes, partition walls, etc., a construction is used to agreat extent consisting of a frame of wood to which is stuck a stiffplate, usually of plywood or wood fibre, on both sides. To give theseelements a greater stability and strength, it is most often desirable tofill the hollow space with a suitable material. Known materials includecompressed straw, approximately round planer chips and various forms ofpaper or cardboard. The last-mentioned materials have lately becomedominant, and the most suitable construction has proved to be the socalled honeycomb type. This consists of upright paper strips lying nextto one another, which are bent or folded in a certain pattern, so thatthe strips touch one another at several points at-which they are gluedtogether.

Both this and other known production methods for paper-, cardboardorcorrugated cardboard fillings have however the great disadvantage thatthey must be made in expensive and complicated machines. This makes theproducts much more expensive. The honeycomb fillings for example, thatare usually made only by a special factory in each country, aredelivered to the wood-ware factories at a price which is many times ashigh as the price of the paper roll from which the product is made.

The object of the present invention is to enable most wood-warefactories, themselves, to produce fillings from the paper rolls by aidof a relatively simple machine, which inserts the fillings into theframeworks or the like that are to be filled.

The invention concerns more specifically a process for production andplacing of lightweight, reinforcing filling material in hollow buildingelements as for example doors or the like, which material is comprisedof upright strips of paper, cardboard or the like of a suitable length.The strips while standing edgewise are passed through suitablemechanical means and bent or folded into suitable waveor zig-zag-shape,the new and characteristic features being, that the shaped and cut stripmaterial, without being stuck together, is guided into the framework ofthe building element. The framework is placed near the strip-makingdevice to receive the strips from said device.

In the drawings FIG. 1 is a side elevation view of a machine embodyingthe invention.

FIG. 2 is a plan view of the machine.

FIG. 3 shows schematically the passage of a strip through the machine.

Strips of filling material according to the invention are in the presentexample made from a big paper roll 1. This roll is journaled with itsshaft horizontal, which at the ends is supported on a suitable rack 6.The driving motor 7 rotates the roller over the driving wheel 8 in thedirection of the arrow.

The web 10 which is advanced from the roll 1 is guided in the exampleshown first between driving rollers which are synchronized with thedriving wheel 8. Then the web 10 goes to some pairs of circular knives2, which divide the web 10 into a number of parallel strips 10. Thesethen pass through a turning arrangement 3, where they by suitableguiding means are turned about their longitudinal axis, so that theirside surfaces turn towards one another. In such upright, parallelposition 10", the strips go through driving rollers 9 to a shapingarrangement 4. In this the strips are submitted to the elIect ofsuitable bending or folding means, for example co-operating rollers witha non-circular circumference, between which the upright strips areguided. The non-circular circumference, which consists of an elasticmaterial, can be shaped so that the desired wave-shape is obtained, andalso the desired shape if the waves are 'cut up separately so that theyeither form an open U-shape, or are shaped as ringor spiral-likeelements on account of the prestressing they have had during therolling.

This arrangement can also have good shapingqualities when the smallrollers, that are made of a material with a low friction coefficient, donot rotate.

The shaping arrangement can also consist of suitable can be arranged inthe folding or bending points of the strips, or other deformation, whichgives the strips further stiffness.

From the shaping arrangement 4 the strips go out, hereby passing cuttingmeans 5 that optionally can be brought into effect.

In FIG. 3 is shown schematically how such a paper strip 10' by passingbetween two pairs of rollers 15 and 16 is given a waved shape. The bigrollers 17 and 18 have eccentric elastic coating 19 and 20, into whichthe small rollers 21 and 22 can penetrate somewhat and cause the desireddeformation of the paper strip 10'. A knife arrangement 23, cuts thestrip into suitable lengths, either for continual course right acrossthe framework to be filled, or in suitable lengths, as indicated at thebottom of FIG. 3.

The waveor zig-zag-shaped strips 10" can go out from the machine anddown into the door-cavity or the like in phase or out of phase,according to what is found suitable.

The building element 11 which is to be filled is placed on a table 13just below the advanced strips 10'. When these are fed out with adistance corresponding to f.i., the breadth of the element that is to befilled, the knives 5 are brought into action, and the whole lot offolded strips 10" falls down into the cavity of the building element.This is in advance provided with glue on the upwards turning side of thelower plate, whereby the strips are immediately glued to this.

The placing of strips 10" of filling material in the hollow buildingelement can however take place in several ways. Thus the outer end ofthe non-supported strips can for example be allowed to drop by their ownweight till they touch the right edge of the cavity of the buildingelement in the drawing, whereupon the building element and the strips10' are moved forwards simultaneously, until cutting takes place by aidof the knives 5, and the ends of the strips also fall down and are gluedto the building element.

Alternatively, the advanced, shaped strips 10" can be supported onsuitable rails, guiding means, supporting rods or other transport meanswhich are schematically indicated by dotted lines 12. These means canthen by suitable arrangements, that are not shown, be brought to conveythe strips down on the building element.

The table 13 or the like on which the building element 11 is supportedcan with advantage be provided with transport means 14 for moving theelement 11 in the same direction and with the same or approximately thesame speed as the advancing of the strips 10".

As it will be understood from the above, there is provided according tothe invention a process and an arrangement for the production andplacing of filling material in hollow building elements, this fillingmaterial being of the shape described above. Thereby the production offilling material can take place directly from for example a paper rollat the place where it is to be used and be put down directly in a hollowbuilding element, for example in a door-filling, a wall section or thelike. Thereby the price of the filling material is reduced to a fractionof the costs that are incurred with the filling material of this typethat is generally used. Further the direct placing of the material isdone more quickly and with less work, which also means a great savingand technical progress.

It will be understood that what is shown and described above are onlyexamples of how the invention can be used, and that the invention is notlimited to these examples; thus it may in certain cases be advantageousto arrange the treatment steps of dividing, turning, shaping and cuttingin another order than described above.

I claim:

1. In a process of filling hollow building elements as for example doorsor the like with lightweight, stifi paper filling material, the stepscomprising continuously leading a web of said material from a rolltoward the building element, slitting the material lengthwise intostrips, twisting the strips longitudinally 90 so that surfaces ofadjacent portions of the strips are parallel to each other, formingundulations in the strips, cutting the individual bent strips intodiscontinuous bent pieces and letting said pieces fall edgewise freelyinto the building element.

2. Apparatus for filling a 'hollow building element as for example doorsor the like with lightweight stiif paper filling material, comprising acombination of a support for said building element, means forcontinuously leading a web of said material toward the building elementover said support, means for slitting the material lengthwise intoparallel strips, means for turning the strips individually ninetydegrees longitudinally so that surfaces of adjacent portions of thestrips are parallel to each other, means for forming lateral bends inthe edgewise oriented strips, means for cutting the individual bentstrips into discontinuous bent pieces whereby said pieces may falledgewise freely into an open face of the building element on saidsupport.

3. Apparatus for filling a hollow building element as for example doorsorlthe like with lightweight, stiff paper filling material, comprising acombination of supporting means for said building element a storage rollfor a web of said material, means for moving said Web toward thebuilding element and over said supporting means, means for slitting theweb longitudinally into a plurality of strips, separate means fortwisting each strip longitudinally and shaping each strip, means forcutting the individual shaped strips into shaped pieces, and lettingsaid pieces fall edgewise freely into the building element, andtransport means for moving the building element in the same directionand with approximately the same speed as the strips of fillingmaterial..

4. Apparatus as claimed in claim 2 wherein the means forming the lateralbends comprise pairs of cooperating rollers, at least one roller of eachpair having a noncircular periphery.

References Cited UNITED STATES PATENTS 2,475,789 7/1949 Kunz. 2,606,1338/ 1952 Havens. 2,633,439 3/1953 Konstandt 52615 X 2,697,461 12/ 1954Konstandt 526 15 X FOREIGN PATENTS 529,027 6/1954 Belgium. 145,8546/1920 Great Britain. 843,631 8/ 1960 Great Britain.

BERNARD STICKNEY, Primary Examiner. FRANKgE. BAILEY, Examiner.

2. APPARATUS FOR FILLING A HOLLOW BUILDING ELEMENT AS FOR EXAMPLE DOORSOR THE LIKE WITH LIGHTWEIGHT STIFF PAPER FILLING MATERIAL, COMPRISING ACOMBINATION OF A SUPPORT FOR SAID BUILDING ELEMENT, MEANS FORCONTINUOUSLY LEADING A WEB OF SAID MATERIAL TOWARD THE BUILDING ELEMENTOVER SAID SUPPORT, MEANS FOR SLITTING THE MATERIAL LENGTHWISE INTOPARALLEL STRIPS, MEANS FOR TURNING THE STRIPS INDIVIDUALLY NINETYDEGREES LONGITUDINALLY SO THAT SURFACES OF ADJACENT PORTIONS OF THESTRIPS ARE PARALLEL TO EACH OTHER, MEANS FOR FORMING LATERAL BENDS INTHE EDGEWISE ORIENTED STRIPS, MEANS FOR CUTTING THE INDIVIDUAL BENTSTRIPS INTO DISCONTINUOUS BENT PIECES WHEREBY SAID PIECES MAY FALLEDGEWISE FREELY INTO AN OPENING FACE OF THE BUILDING ELEMENT ON SAIDSUPPORT.